test(plugin-grid): keep the bulk-refresh harness's handler map typed as the runner's

Claude-Session: https://claude.ai/code/session_01Utp6CZ1rxZPzain2p5bv5x
Co-authored-by: Claude <noreply@anthropic.com>

Author: claude

ui/packages/plugin-grid/src/__tests__/bulkActionRefresh.test.tsx

@@ -71,7 +71,7 @@ function makeDataSource() {
   } as any;
 }
 
-function renderGrid(dataSource: any, handlers: { approve: (...args: any[]) => unknown }) {
+function renderGrid(dataSource: any, handlers: Record<string, any>) {
   const schema: any = {
     type: 'object-grid',
     objectName: OBJECT,